Amount of liability recognized arising from contingent consideration in a business combination.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

Name:	us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies - Additional Information (Details) - USD ($)		1 Months Ended
	Jul. 12, 2019	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Commitments And Contingencies [Line Items]
Estimated future contingent consideration			$ 5,270,000	$ 5,390,000	$ 16,390,000	$ 2,750,000
Lonza Manufacturing Agreement [Member] \| AdCOVID [Member]
Commitments And Contingencies [Line Items]
Commitment To Procure Equipment and Construction		$ 23,000,000.0
Spitfire Pharma, Inc. [Member] \| Sales Milestones [Member]
Commitments And Contingencies [Line Items]
Estimated future contingent consideration	$ 80,000,000.0
License agreement term	10 years